Hind sight is 20/20. We had only 1 game from Arneson to digest the system. then his notes, typed, and then we went gonzo on it, with it in the playtests. The rules, 10 pages to start, grew in the backwash of the playtests, page by page. Normally rules are fashioned up front and then playtested, but not in this case as we had to re-emulate what Arneson and his group had attained in over 1 year of playing BM; and Gary decided on a more "progression" styled advance for Characters. This defined the system in all ways thereafter, warts and all. It is obviously styled on the old systems of linear progression and it works. Is it realistic? Well, no. It's an abstraction of what we say is Fantasy because Fantasy has no concrete data and history like simulation games do. That Gary carried it forth to AD&D is impressive; and he admitted that the rules (OD&D) were likely unfinished but that the concept had to get out there, he felt, in order to finish them. This concept had never before existed in systems/published games. That is the biggest context and to dismiss its generative days as flawed is quite preposterous. Kinda like saying that, by today's standards. that the Model-T Ford was flawed compared to a Mustang.